Código CSS:
Ver original<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Pagina de Colores</title>
<style type="text/css">
#site
{
width:100%;
margin:auto;
}
#header
{
background:red;
height:105px;
}
#leftpane
{
width:50%;
float:left;
background:blue;
height:500px;
}
#contentpane
{
width:50%;
float:right;
background:green;
height:500px;
}
h1
{
color:white;
text-transform:capitalize;
font-family: "Times New Roman", Times, serif;
font-size: xx-large;
text-decoration: blink;
text-align: center;
}
</style>
</head>
<body>
<div id="site";>
<div id="header";><h1>aqui va el rojo</h1>
</div>
<div id="leftpane"><h1> aqui va el azul</h1>
</div>
<div id="contentpane"><h1> aqui va el verde</h1>
</div>
</div>
</body>
</html>